Carriage-spring



H. S. CLARK.

Carriage-Spring.

No. 25,246. Patented Aug 30, 1859.

IHIMWr O MPEIERS. PHOTO-LIIMOGRAPNER. wAsmNngN. D C

STATES ATENT OFFICE.

H. S. CLARK, OF WYALUSING, PENNSYLVANIA.

CARRIAGE- SPRING.

Specification of Letters Patent No. 25,246, dated August 30, 1859.

To all 'whom it may concern:

Be it known that I, H. S. CLARK, of Tyalusing, in the county of Bradfordand State of Pennsylvania, have invented a new and ImprovedCarriage-Spring; and I do hereby declare that the following is a full,clear, and exact description of the same, reference being had to theannexed drawings, making a part of this specification, in which- Figurel, represents a side elevation of a spring constructed according to myimprovement. Fig. 2, is a plan or top view of the same.

Similar letters of reference indicate cor-' responding parts in the twofigures.

To enable others skilled in the art to fully understand and construct myinvention, I will proceed to describe it.

A, A, represent two elliptical springs constructed in the usual mannerby placing two or more leaves of spring steel one on the top of theother and connecting the same by means of clamps, bolts, rivets, or anyother sui'table means, and the leaves are taken of different length inorder to give the spring the necessary resistance on the center andstill leave the same sufficient elasticity by decreasing it-s resistancetoward the ends. I use only two leaves, a., and b, for each of mysprings, and attached to the inner leaves Z), Z), are two additionalleaves B, B, bent into the shape of a W, and connected to the springs inthe center. These leaves B, B, join with their ends at c, and a plate D,is placed over the oint in order to strengthen that part of the spring,and this plate is fastened to the spring by means of bolts or rivets.The

outer ends of the W-shaped leaves extend beyond the inner or bed leavesof the springs A, A, and a spring constructed out 0f two leaves a, b, oneach side with the additional W-shaped leaves in the center is just asstrong as a spring with three leaves and connected in the usual mannerby ears at the ends, and it is not only very troublesome to make theseears and connect the springs in this way, but a spring constructedaccording to my invention has more life with the same strength, as theadditional W-shaped leaves have some elasticity of their own, and theytherefore increase the liveliness of the whole spring without impairingits strength.

These springs are particularly adapted for carriages and light vehicles,as they can be constructed lighter and cheaper than ordinary springs,and as by reason of their greater elasticity they render the vehiclemuch more easy for both traveler and horse. By adding more leaves,however, these springs are equally adapted for. heavy vehicles.

I do not claim, broadly, the invention of the W-shaped spring; but

Having thus described my invention, I claim, and desire to secure byLetters Patent- The arrangement and combination of the W-shaped leavesB, B, with the elliptical springs A, A, as herein shown and described,so that the extremities of the leaves B, B, will approach each other andwill be secured at the centers o-f the springs A, A, as specified.

H. S. CLARK.

lVitnesses:

HENRY GAYLORD, I. R. WELLES.

